2. There are two groups of people who use a lake. You have conducted a survey and found that they have the following characteristics: Time to lake (minutes) Distance to lake (miles) 4 12 Trips per year Group 10 30 20 10 Calculate the round-trip travel cost for groups A and B if the cost of traveling a. one mile is $0.50 and the cost of time is $18/hour. Calculate the demand curve for lake trips. Calculate the consumer surplus for these groups from the lake. b. c